Water grate



April J; a. GIBSON vmina Gama Original Filed July 5. 1923 Patented Apr.12, 1927.

UNITED STATES JOHN G. GIBSON, OF'VENTNOR, NEW JERSEY.

WATER GRATE.

Original application filed July 5, 1923, Serial No. 649.487.

This invention, generally stated, relates to steam and hot water boilersemploying forced or induced draft and has more particular relation tothe providing of certain new and novel sectional hollow grates thereforwhich may be formed integral with the water-legs of a boiler section atthe time of manufacture of the boiler or which may be installed inexisting boilers without effecting change in the construction thereof.Other and further objects relate to the provision of general details ofconstruction and in the arrangement and combination of parts hereinafterset forth.

The invention consists of the novel structure hereinafter described andfinally claimed.

The nature, characteristic features and scope of the invention will bemore fully understood from the following description taken in connectionwith the accompanying drawings forming part hereof, and in which:

Fig. 1 is a top view partly sectioned of a pair of detachablegrate-bars.

Fig. 2 is a view in section showing a repair element in position in lieuof the flange 17 which has broken off.

Fig. 3 is a fragmentary view illustrating the grate-bar as shown inFigs. land 2 formed integral with the water-leg of a boiler section.

For the purpose of illustrating my inven tion I have shown in theaccompanying drawings one form which is at present preferred by me,since the same has been found in practice to give satisfactory andreliable results, although it is to be understood that the variousinstrumentalities of which my invention consists can be variouslyarranged and organized and that my invention is not limited to theprecise arrangement and organization of the instrumentalities as hereinshown and described. This case is a division of application Ser. No.649,487.

In the water-grate claimed in my Patent Number 1366,37? dated January25, 1921, use is made of removable, tubular sections having perforateddomes. In the present instance these sections may be omitted or used incertain instances and the grooves of adjacent grate-bars form tubularchannels for the passage of air to the grate surface. The grooves.however, do not extend through the top of agrate-bar as shown inBivitlcd and this application filed U'ctohcr 24,,

Serial No. 745,548.

my said patent and while the flanges at the lower end of the grooves mayremain it is preferable in some cases to omit same. lVith the exceptionof these changes the general arrangement of grate-bar is similar to thatdisclosed in patent aforesaid.

Referring now to the drawings, 10 designates a grate-bar which is hollowfor the circulation of water therethrough as is well understood in theart. Each side wall of a grate-bar. 10 is vertically grooved from thebottom thereof to within a short distance of the top thereof. Thesegrooves which may be of any desired shape are spaced apart and aredesignated 11. The top wall of a grate-bar overhangs the glOoves 11 of acompanion grate-bar throughout its extent. In other words the overhangis continuous. The opposite grooved face of each gratebar is providedwith horizontally disposed, spaced ribs 12 adapted to co-actively engagewith said recessed portions 13 whereby adjacent or abutting grate-barsmay be interlocked. These recessed and ribbed portions form overlappingparts to preclude air seeping up between adjacent grate-bars, or inother words allair must pass up through the apertures of the ledges, tobe evenly distributed, as before described. In practice cement or thelike may be applied between the adjacent faces of grate-bars. The sidewalls 14 of each grate-bar are shaped to follow the curves of thegrooves 11 so that approximately the same thickness of metal is presentthroughout a grate-bar to provide for uniformity of cooling surface. Thethickness of the over-hung portions is of approximately the samethickness as the grate-bar. Each grate-bar is provided up on one sidewall with grooves 11, above mentioned, which extend through the gratebartop in the same manner as those shown in my aforesaid patent. Thesegrooves are recessed or countersunk at their tops as at 15. At. theirbottoms each set of grooves are provided with flanged parts 16. Thegrate top upon that side provided with grooves 11 is provided withlaterally disposed flanged parts 17 which not only over hang saidgrooves 11 but are further extended to seat within the recessed orcountersunk parts 15 of grooves 11 of an adjacent grate-bar. Theseflanges 17 are semicircular, as are the recessed parts 15, and

be cast integral with a water-leg 19 of a boiler, as shown in Fig. 0.

It will now be :zppa out that l have devised a novel and us ll construe"n which embodies the 2 enumerteaturer: of advent: ated as desirable inthe statement of the invention and the above dz .on and while I have inthe present i. ce ash wn and described the preferred embodiment thereofwhich has been found in practice to give satisfactory and reliableresults, it is to be understood that the same is suseptible ofmodification in various particulars without departing from the spirit orscope of the invention or sacrificing! any of its advantages.

lvhat I claim is:

'l. In a grate constructimi of the character stated a plurality ofhollow grate-bars arranged side by side the meeting faces o'l' saidgrrale-bars being); provided with registering, vertical groovescooperating to provide air ducts, the top wall of a grate-bar adjacentone set of grooves being recessed and bevoiled and the top wall thereofoverlying the opposed set or grooves and flanged to seat within therecessed part of a companion grate-bar, the flanged part being; bevelledand apertured in communication with regis tering grooves.

2. In a grate coi'ist-ruction of the character stated a plurality vol'hollow grate-bars urranged side by side, the meeting -faces of saidgrate-bars being provided with rcgis tering, vertical groovescooperating to pro vide air ducts, the top wall upon one slice 0'? agrate-bar overlyingone set of grooves and having: a plurality of (at:Jersunk bevelled spaced portions and the top wall of the op posite sideof the grate her being; provided with a plur lity ot' lly extendedspaced flanges shaped to seat with said rountersunlr portions of acompanion gratobar, said flanged parts being apertured in eonnnunicationwith said registering grooves.

3. In a grate construction of the character stated a plurality of hollowgrate-bars arranged side by side. the meeting: faces of said gratebarsbeing provided with registoring vertical grooves cooperating to form airduets, the top wall of a gratobar adjacent one set of grooves beingformed upon an are of c'rele and recessed and the top wall thereotoverlying the opposed of grooves and flanged upon an arr oi a circle toseat within the recessed part of a companion rte-bar, the flanged partbeing apertured in comnumication with registering grooves one side wallof each grate-bar being horizontally recessed and the opposite side wallbeing ribbed for engaging a recessed wall of a companion gratebar.

In testimony whereof,

signed my name. T v

JOHN G. GIBSON.

I have hereunto

